| 摘要 |
To improve listener perceived characteristics multi-channel sound reproduction systems are known which include a surround sound channel. It is preferred to reproduce the surround sound signal (S) without having rear loudspeakers, so using the front stereophonic loudspeakers (LL, RL). To improve the surround sound the frequency range of the surround sound signal (S) is divided (by SSPU1) in at least two adjacent frequency bands. After division the two parts (SR, SL) of the surround signal (S) are expanded to further improve the reproduced surround signal. At last the surround signals (SR, SL) are combined (by CM1, CM2) with the respective stereophonic signals (L, R).
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